bugs on my skin. i took a razor and i tried to cut some of them out. >> what was this business over here? lying down and looking at the ball? >> in all, some 7,000 military volunteers or more, were part of chemical tests at edgewood from 1955 to 1975. the military test at least 250 chemical and biological agents during the cold war, including potentially lethal nerve agents like vx and serin, incapacitating drugs, bz, bar bit ats, tranquilizers, narcotics and hallucinogens. this army film shows soldiers performing drills under the influence of lsd. >> notice the volunteer who saluting seven times, five minutes later, it ends his participation in the tests. >> reporter: army volunteers were ordered not to tell anyone about what happened.